Dna Biology

February 28, March 1 Meiosis leads to the business of sperm and ballgametes Mitosis leads to the production of somatic cells personify belonging Mitosis and Cell unconstipated recurrence Growth- trillions of genetically identical cells that suffer up our body Wound repair- scrape, mitosis and cytokinesis generate cells that repair your skin Reproduction- production of genetically identical cells chromo some(prenominal) consists of a single DNA that is wrapped some proteins . Interphase vs Mitosis phase Interphase is an kl active time; cell is either ontogeny and preparing to ramify or fulfilling its spi,./ecialized its specialized function in a cellular individualnondividing pahse M phase- dividing phase S pahse- reverberation of genetic fabric is separated Control of the cell round Before cells enter M, phase, there is a regulative hint that helps cells go into M phase from G2 phase. The regulatory molecule is called MPF Mitosis Promoting constituent M ade up of 2 distinct polypeptide subunits Protein Kinase- and enzyme that catalyzes the carry-over of phosphate group from ATP to a target protein--CDK So MPF phosphorylates a protein that triggers mitosis Other subunit is called Cyclin MPF is in aroused by phosphorylation at two sites and is activated by dehosphorylation at one site.

Checkpoints cell cycle lock G1 checkpoint- Size, if the cells are too small the its daughter cells usage be fucked so it use return the checkpoint Availability of nutrients- if not nutrients it wont replicate Social signals- the pass or dont pass through g1 phase in response to separate cells vilify to P53- If Dna is damage, then the protei n p53 activates apoptosis G2 Checkpoint- if! DNA is damaged or chromosomes are not replicated correctly then MPFs dephosphorylation is blocked Final Checkpoint- Metaphase checkpoint If not all chromosomes are habituated properly to the spindle apparatus, M phase arrests at metaphase. G1 too prevents the growth of mature cells by putting them into a g0...If you urgency to get a adept essay, order it on our website: OrderEssay.net

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